WORCESTER 
A jury found Allen M. Stilkey of Douglas guilty this afternoon of manslaughter and threatening to commit a crime in connection with his wife Lisa's fatal leap from a second-floor window of the couple's home 10 months ago following a ferocious, alcohol-fueled fight.

The six-woman, six-man jury decided the fate of the 41-year-old former national arm-wrestling champion this afternoon. Prosecutors said Mr. Stilkey will be sentenced at 11 a.m. Friday.

Mr. Stilkey has been held in lieu of $75,000 cash bail since his arrest.

Both sides agree that the couple, who had met online four years ago and married in Las Vegas in 2010, had been having marital and financial problems. Feb. 9 was designated as “date night” and the two had drank heavily at two bars before returning home.

The loud, vicious argument ensued after Mr. Stilkey turned on his cellphone and began texting a 20-year-old woman he said was a friend.

Defense attorney Michael Hussey, in his closing statement, maintained that Mrs. Stilkey, heavily intoxicated and jealous, was the aggressor. After crashing a glass coffee table and bursting two bottles of wine, she threw a key holder at her husband causing a scratch on his face. He also said that Mrs. Stilkey also pushed her husband's head into a flat-screen TV on the wall leaving a large dent.

Mr. Hussey said his client became angry and reciprocated the violence by knocking things off a mantle, throwing a vacuum cleaner into a wall outside the upstairs bedroom. All the while the couple were hurling hurtful curse words at each other.

Mr. Stilkey, the only defense witness, last week testified, that the couple argued downstairs and upstairs. At one point, he said he took off his wedding ring and said he was done with the marriage. When his wife was alone upstairs in the bedroom, he heard the window open and another loud noise. He said that he went back upstairs only to see his wife's feet exiting the window.

Mr. Hussey said the death was a terrible tragic loss that does not make sense. He said that it was a decision “that was no doubt was driven by anger, turmoil and fueled by alcohol.

“The absolute unfairness of Lisa's death can not be made right by unfairly blaming him,” Mr. Hussey told the jury. “A fair and unemotional consideration of the evidence would not show beyond a reasonable doubt that he is responsible for her death.

Assistant District Attorney Brett Dillon, however, said Mrs. Stilkey jumped out of the window to escape the harm she anticipated from Mr. Stilkey.

Her 23-year-old son, Timothy MacIntyre, testified last week that his mother called him during the fight. He said his mother said Mr. Stilkey made her have sex with men while he watched. Mr. Stilkey denied the allegation when he testified. He said the two were swingers and mutually agreed to have sex with other people.

But, the son said that he heard Mr. Stilkey in the background tell her that he was going to kill her when she got off the phone.

Mr. Dillon said Mrs. Stilkey was forced to jump out of the window because her husband had scared and intimidated her and threatened to kill her.

Another witness, Brianna Defreitas, 21, who lived next door to the Stilkey's at the time, testified last week that she had heard the couple fighting and cursing each other several times when they came home late at night. She said Mr. Stilkey would call his wife “the C-word and the B-word.” And, that on two occasions, she saw Mr. Stilkey slap and punch his wife and take her by the shoulders and shake her.